Chuck device



March 30, 1937.. G. w. EMRICK I 2,075,031

CHUCK DEVICE Filed May 2, 1935 llllllll INVENTOR 650/?65 M f/v/Plc/rAfToRNEz Patented Mar. 30, 1937 I UNITE srAsPArsN orries CHUCK DEVICEGeorge W. Emrick, Brooklyn, N. Y. Application May 2, 1935, Serial No.19,385 3 Claims. (Cl. 279-63) This invention relates to what arecommonly key ring. The body has at the lower end therereferred to aschuck devices for use in drilling and of a tool receiving bore ll andcentrally with a boring as well as in conjunction with devices, reducedbore l2 forming a guide and bearing for machines or apparatus of variouskinds and the lower projecting stud 13 on the cone 6.

5 classes; and the object of the invention is to Above the bore l2, thebody 5 is provided with 5 provide a chuck device which may be quickly anenlarged conical bore l4 terminating at its and easily operated inclamping a tool therein lower end in a seat l5 adjacent which the loweror in releasing a tool therefrom and wherein betend of the cone 6 isarranged. The body 5 also ter wearing qualities are provided; a furtherobincludes a plurality of angular bores or passages 10 ject being toprovide a chuck device, the conl6 which open into the bore H and throughthe 10 struction of which or the several parts thereof upper end of thebody and in which the jaws 3 has been materially simplified; a furtherobject are mounted. being to provide aball bearing mounting between Thebody 5 also includes an aperture H in the cap of the chuck and the conethereof to one side wall thereof to receive an operating rod 7compensate for the different thrusts to which the or tool facilitatingthe opening and closing of 15 deViOe i5 bje as Well as o maintain thethe chuck as will be apparent. Centrally of the cone in centralizedposition and to reduce wear body 5 i an enlarged hurled portion W by pChuck p d Still further in means of which the chuck may be operated bylieving any tendency of the cone and jaws to hand, the cap I having asimilar hurled portion r w p rt; a further bj being to So mount l9'whichalso facilitates this operation. The cap 20 the Jaws as to permit theengagement of the 1 is jnternany threaded as seen at 20 to engage upperehds thereof with the bearing bans when an externally threaded portion2| of the body in the chuck 15 Open thus Serving as stops which couplingsaid parts together, the outside diamwih hh the stihkihg of the l h ineters of the body and cap being substantially the Open posltlqn; sunfmither ObJect bemg same. Between the lower end of the cap and the 25pmvlde' economlcal and yet effectfve upper end of the enlarged nurledportion I8 is manner of securmg h cap to F body of t disposed the ringiii, a portion of which may be chuck by means of a ring, the thicknessof which flexed upwardly into a recess 22 m the cap as may be Varied inh manhfacture of fi device seen at the right of Fig. 1, and downwardlyinto as Well as m makmg repalrs to provlde proper arecess 23 in the bodyas seen at the left of Fig. 39 fitting of the cone within the chuckbody; and 1 and also in 4 of the drawing These with these and otherobjects in view, the invenserve to cap and body Against rota,

tum 00115156 m a chuck device 9 t and tion one with respect to theother. At this time, for the purpose specified, which is simple in conitwill also be apparent that the thickness of the struction, efficient inuse, and which is constructrm 3 will govern the arrangement of the lowered as more fully hereinafter described and g claimed end of the coneupon the seat l5 to avoid exces- The invention is fully disclosed in thefollowt fnchon 0f cone on this and from time to time, and if necessaryat any time, a new ring may be substituted to compensate for any ingspecification, of which the accompanying drawin forms a art, in whichthe se arate arts g p p p wear between the cone and the bearing surfaceof my improvement are designated by suitable reference characters ineach of the views, and

The cone 6 is provided with an external screw in which:

Fig. 1 is a longitudinal sectional view through 24 adapted F be engagfdby threaded a chuck made according to my invention portions 25 on theinner ends or the aws E as 45 Fig. 2 is a side and sectional Viewshowing parts clear Seen in Figs; 1 and 2 of e drawing- T in a difi tposition cone is provided with a tapered bore 26 opening Fig. 3 is anirregular section on the line 3-3 through the upper end thereof toreceive a sp nof Fig. 1; and, die in the usual manner and the side wallof the Fig. 4 is a face view of a part of the chuck, i1- co e adj e thepp end thereof is p o d 50 lustrating a looking or keying means betweenWith an annular gTOOVe 27 in Which the b g certain parts. balls 9 seat.The cap 1 has an annular groove In the drawing, 5 represents the chuckcasing 28 in which the balls 9 are adap to Seal It or body; 6 the cone;1 the cap; 8 the jaws; 9 the will be noted that the groove 28 is formedin the bearing balls; and ID the spacing and lock or corner portion ofthe cap and opens freely 55 through the bottom thereof so as tocompensate for lateral as well as longitudinal thrusts. The bearingballs serve to maintain the cone in centralized position, thuseliminating excessive wear 5 of the stud E3 in the bore [2. The jaws 8are adapted to extend into the chamber of the cap to engage the bearingballs 9 when moved upwardly in the manner indicated in Fig. 2 of thedrawing, thus avoiding any tendency for the 10 jaws to stick within thechuck body in this position, as has been experienced with other chuckdevices of this kind. It will appear from a consideration of Fig. 3 ofthe drawing that the threaded portion 25 of the jaws 8 are flattened atopposite sides as indicated at 8a in said figure to engage flattenedwalls Ilia at the upper end of the passage I6 to key the jaws againstrotation in the chuck body and to maintain the lower beveled jaw ends81) thereof in proper alinement one with respect to the other.

It will appear from the foregoing that my improved chuck devicecomprises comparatively few operating parts and the separate parts areall of simple construction, thereby materially reducing themanufacturing costs and at the same time, facilitating the assemblage ofthe parts. By using the ring construction I9, a very simple and yeteffective means is provided for properly mounting the cone within thechuck body as well as in keying the cap and chuck together after theseparts have been properly assembled. It will be understood that the ring10 is normally of straight wall construction, and the offsets at 22 and23 are made in the ring by the use of a suitable tool. It will alsoappear that the chuck may be moved into operative or engaging positionand released therefrom in a simple and effective manner, the excessivefrictions between the parts being materially reduced by the use of thebearing provided.

It will be apparent that the particular design and contour of therespective parts of my improved chuck device are merely illustrative ofone method of carrying the invention into effect,

and this is also true of the proportionate size of the respective parts,the distinctive features residing in the combination longitudinal andradial thrust bearing having the further feature of selfcentering thecone within the chuck body and in utilizing the bearing balls as a stopand thrust for the jaws of the chuck and the spacing and lock ringemployed.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent, is:

l. A chuck device comprising a body having jaws movable longitudinallyand radially therein, a cone mounted in the upper end of said body andincluding a bearing at the lower end thereof in the central portion ofsaid body, means on the cone engaging the jaws for actuating the same, acap detachably coupled with said body and encircling said cone, aplurality of bearing balls arranged between the cap and said cone abovesaid body to centralize the cone within said cap and body, and the upperends of said jaw members being exposed to said bearing balls through theupper end of said body and adapted to engage the same to limit upwardmovement of said jaw members.

2. A chuck device comprising a body having jaws movable longitudinallyand radially therein, a cone mounted in the upper end of said body andincluding a bearing at the lower end thereof in the central portion ofsaid body, means on the cone engaging the jaws for actuating the same, acap detachably coupled with said body and encircling said cone, aplurality of bearing balls arranged between the cap and said cone abovesaid body to centralize the cone within said cap and body, the lower endportion of the cone seating in said body, means including a spacing ringdisposed between the cap and body for gaging the mounting of said conein said body, and means on the cap and body engaged by parts of saidring for keying the cap and body against rotation one with respect tothe other.

3. In a chuck device of the class described consisting of a chuck bodyand a plurality of jaw members angularly arranged in and movablelongitudinally with respect to said body with means engaging the jawmembers for moving the same into open and closed positions, and aplurality of bearing balls arranged and supported in predeterminedposition at the upper end of the chuck body for engagement with theinner or upper ends of said jaw members in the inward or upward movementthereof to prevent the sticking of said jaw members in said chuck body.

' GEORGE W. EMRICK.

